Armadillos are Tropical American mammals known for their bony armour shell which is their way to defend themselves by rolling themselves into a protective ball. Outside reproduction, Armadillos are quite solitary feeding from insects or worms that they find by digging the floor.

It is interesting to notice that some species like the 9-banded armadillo have a peculiar reproduction system: females give birth only to absolutely identical quadruplets (polyembryony, several embryos from  one egg).